What disappoints us is that he didn't keep his promise/words.
或者It is disappointing to us that he didn't keep his words/promise.
英语翻译使我们失望的是,他没格首诺言 帮我翻译下!英语
What disappoints us is that he didn't keep his promise/words.
或者It is disappointing to us that he didn't keep his words/promise.